Radio attachment for phonographs



C. M. POST RADIO ATTACHMENT FOR PHONOGRAPHS Filed June 12, 1922 on the tone arm 11.

Patented Jan. 27, 1925.

UNITED STATES CARL 'M. POST, OF DES MOIN'ES, IOWA.

RAPIO ATTACHMENT FOR PHONOGRAPHS.

Application filed June 12, 1922. Serial No. 567,628.

To allwhom it may concern:

Be it known that I, CARL M. 'Pos'r, a

citizen ofthe United States, and a resident of Des Moines, in the county of Polk and State of Iowa, have invented a certain new and useful Radio Attachment for Phonographs, of which the following is a specification.

The object of my invention is to provide a radio attachment for phonographs whereby the sound may be passed through the amplifier of the phonograph, the parts being of simple, durable and comparably inexpensive construction. More particularly my invention relates to an attachment adapted to be secured to the tone arm of a phonograph and to have a pair of ear pieces of the radio set secured thereto so that the sound will be passed through the phonograph.

'Still another object is to provide'rubber bands on the attachment for holding the ear pieces properly positioned.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which: I

Figure 1 is a perspective View of a portion of a phonograph with my improved attachment shown thereon.

Fi ure 2 is a side elevation of my,attachment with the ear pieces secured thereon; and

Figure 3 is a central sectional view taken through my attachment.

In the accompanying drawings I have used the reference numeral 10 to indicate generally the phonograph which is provided with the tone arm 11. The reproducer ordinarily placed on the tone arm 11 is removed and my attachment 12 is placed ment 12 is slipped over the tone arm mem-' ber 11. 1 v In this connection it may be mentioned that in some types of the tone arms it is necessary to place one end of the attachment within the tone arm, while in others it is necessary to insert the tone arm into the attachment.

On each of the free ends of the Y-shapcd member or attachment 12, I provide a pair of disks 13 preferably of rubber or some other resilient materiaL- A The disks 13 are merely forced onto two of the ends of the attachment or the Y- shaped member 12. y

The ear pieces 14 of the radio instrument are placed against the'disks 13 and in order to properly. hold them in position, I pro vide a pair of rubber bands 15 and 16.

In order to prevent the rubber bands from slipping, I provide a pair of lugs 17. The rubber bands 15 and 16 rest against the lugs 17 and thus prevent the rubber bands 15 and 16 from slipping.

It will be seen that the rubber bands form very eflicient means for holding the ear pieces 14 on the disks 13. It will be seen that my attachment affords very etlicient means for securing the ear pieces of a radio structure to a phonograph in such a manner that the sound will pass through the amplifier of the phonograph.

By using the amplifier of the phonograph the sound is clear and much lonnder. If it is desired, the ear pieces and the attachment 12 may be held together at all times by the rubber bands 15 and 16, and when desired to use the phonograph, the attachment 12 is slipped off from the tone arm 11 and the ordinary reproducer is placed on the tone arm of the phonograph. The using of rubber bands prevents a distortion of the vibrations as would be the case if springs or other metallic devices were used for holda in-g the ear pieces in position.

Some changes may be made in the construction and arrangement of the various parts of my invention, without departing from the real spirit and purpose of my invention and it is my intention to cover by claims, any modified forms of structures or use of mechanical equivalents which may be reasonably included within their scope.-

I claim as my invention:

1. A radio attachment for phonographs com-prising a hollow Y-shaped member adapted to fit the tone arm of the .phonograph, a disk on each of the free ends of said Y-shaped member, radio instrument ear pieces designed to rest against said disks and rubber hands extended over the ear pieces and said Y-shaped member 'for holding the pieces in position so that the vibrations for rubber bands extending over the ear pieces and said Y-shaped member for holding the pieces in position, lugs on said Y-shaped member for preventing the rubber bands from slipping, the parts being so arranged that the vibration for causing-the sound will be transmitted through the amplifier of the phonograph for the purposes stated.

3. An attachment for connecting the car pieces of a radio instrument to the tone arm of a phonograph including 3 a hollow Y- shaped member adapted to be secured to the arm of the phonoglfgph, disks on the freeends of the Y-sha member, bands for yieldingly holding the ear pieces on said disks for the purposes stated.

4. An attachment 'for connecting the ear pieces of a radio instrument to the tone arm of a phonograph including a hollow Y-' shaped member adapted to be secured to th( arm of the phonograph, disks on the fre ends of the Y-shaped member, bands for yieldingly holding the ear pieces on said disksand means for preventing the slipping of said bands for the urposes stated.

Des Moines, Iowa, une 8, 1922.

CARL M. POST. 

